Modeling of the temperature field generated by the deposition of weld bead on a steel butt joint by FEM techniques and thermographic images

The aim of this work is to predict the temperature field generated by welding a steel butt joint (API 5L X80). The prediction was modeled by finite element software Abaqus where the subroutine was developed in Fortran so that heat source motion may be included. The motion was based on the Goldak...

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Bibliographic Details
Published in:	Materials research (São Carlos, São Paulo, Brazil) Vol. 21; no. 3; p. 1
Main Authors:	Rocha, Eduardo José Fernandes, Antonino, Tiago de Sousa, Guimarães, Pablo Batista, Ferreira, Ricardo Artur Sanguinetti, Barbosa, José Maria Andrade, Rohatgi, Janardan
Format:	Journal Article
Language:	English
Published:	Sao Carlos Universidade Federal do Sao Carlos, Departamento de Engenharia de Materiais 01-01-2018 ABM, ABC, ABPol Associação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol)
Subjects:	API 5L X80 steel welding Butt joints Butt welding Computer simulation ENGINEERING, CHEMICAL Filler metals Finite element method FORTRAN Gas metal arc welding Heat Heat exchange infrared thermography Latent heat MATERIALS SCIENCE, MULTIDISCIPLINARY Mathematical analysis Mathematical models METALLURGY & METALLURGICAL ENGINEERING Numerical modeling Predictions Temperature dependence Temperature distribution temperature field Thermal conductivity Thermal diffusivity Thermal expansion Thermography Thermophysical models Thermophysical properties Numerical modeling infrared thermography API 5L X80 steel welding temperature field
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Summary:	The aim of this work is to predict the temperature field generated by welding a steel butt joint (API 5L X80). The prediction was modeled by finite element software Abaqus where the subroutine was developed in Fortran so that heat source motion may be included. The motion was based on the Goldak's double ellipsoid. In the model material nonlinearities were included such as thermophysical properties (coefficient of thermal expansion, specific heat, thermal diffusivity and thermal conductivity), which are dependent on temperature and latent heat, heat exchange by convection and radiation and mechanical boundary conditions. The thermal field predicted by the model was validated by infrared thermography. GMAW simulations with the use of an "evenmatched" solid wire (filler metal) carried out the welding process. The results obtained from the numerical model and thermography were in good agreement.
ISSN:	1516-1439 1980-5373 1980-5373
DOI:	10.1590/1980-5373-mr-2016-0796